Sofa



FIG. 1 is a front elevational view, showing our new design.

FIG. 2 is a side elevational view thereof.

FIG. 3 is a rear elevational view thereof.

FIG. 4 is a top plan view thereof.

FIG. 5 is a bottom plan view thereof; and,

FIG. 6 is a front and side perspective view thereof. 

The ornamental design for a sofa, as shown and described. 